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Yogita Ingle 5 years, 7 months ago
|
Symbol |
Definition |
Nature of Value |
Unit |
|
Acceleration due to gravity |
g |
The acceleration experienced by a body under free fall due to the gravitational force of the massive body |
Changes from place to place. Acceleration due to gravity of earth is 9.8m/s2 |
m/s2 |
Universal Gravitational Constant |
G |
The force of attraction between two objects with unit mass separated by unit distance at any part of this universe. |
Constant at any point in this universe. G = 6.673×10-11Nm2/kg2 |
Nm2/kg2 |
Posted by Naina Choudhary. 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
Biotic factors relate to all the living things in the ecosystem. Their presence and their biological by-products affect the composition of an ecosystem. Biotic resources include all living organisms from animals and humans, to plants, fungi, and bacteria. The examples of biotic resources relate to all the living components of an ecosystem. These include producers, consumers, decomposers and detritivores.
Abiotic factors refer to all the non-living chemical and physical factors present in the atmosphere, hydrosphere, and lithosphere. Sunlight, air, precipitation, minerals, and soil are some examples of abiotic factors.
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Posted by Aalok Jinralkar 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
| Nitrite | Nitrate |
| Made up of a nitrogen atom and two oxygen atoms | Made up of a nitrogen atom and three oxygen atoms |
| The oxidation number of nitrogen in nitrites is +3 | The oxidation number of nitrogen in nitrates is +5 |
| Forms a weak acid known as nitrous acid | Forms a strong acid known as nitric acid |
| Has a bent molecular geometry shape | Trigonal plane geometry shape |
| Oxidised to form nitrates | Reduced to form nitrites |
| Used in food preservatives | Used in fertilizers and explosives |
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Yogita Ingle 5 years, 7 months ago
Notochord is a long rod-like support structure that runs along the back of the animals, separating the nervous tissue from the gut. It acts as a supporting structure by providing a place for muscles to attach for the ease of movement.
Posted by Wang Wei 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
Sulfate and sulfite ions are the polyatomic ions which are formed by the combination of sulfur and oxygen atoms.
The chemical formula for sulfate and sulfite are{tex} SO_4^{2-}\text{ and }SO_3^{2-}{/tex} respectively.
Sulfide ion is the ion which is formed by the gaining of electrons by sulfur atom. Sulfur atom gains 2 electrons in order to form stable atom. The ion formed by gaining 2 electrons by sulfur atom is{tex} S^{2-}{/tex}
Thus, the chemical formula for sulfate, sulfite and sulfide ions are {tex}SO_4^{2-},SO_3^{2-}\text{ and }S^{2-}{/tex} respectively.
All the ions carry a charge of -2.
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i. Chlamydia - It is a bacterial disease and infects the cervix in women and the penile urethra in men. Its most frequent symptoms are pain during *** and discharge from the ***** or ******.
ii. Gonorrhea - It is a common bacterial STD. Symptoms of gonorrhea include burning when urinating and, in men, white, yellow, or green discharge from the *****.
iii. Syphilis - It is a common STD caused by the bacterium Treponema pallidum. It is transmitted by direct contact with syphilis sores, which can appear on the external genitals and the mouth, as well as in the ****** or rectum.
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The Unknown Indian 5 years, 7 months ago
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